jp.aws.test.AmazonClientManager.java Source code

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Here is the source code for jp.aws.test.AmazonClientManager.java

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/**
 * @file
 * @brief AmazonClientManager
 * @author tmor
 * @licence Apache License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0
 * @note
 * - ?static???????
 *
 * $Revision:$
 */
package jp.aws.test;

import jp.aws.test.ec2.EC2Region;

import com.amazonaws.ClientConfiguration;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.ec2.AmazonEC2Client;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.util.Log;

public class AmazonClientManager {
    private static final String LOG_TAG = "AmazonClientManager";

    private Context context = null;
    private AmazonEC2Client ec2Client = null;
    private AmazonS3Client s3Client = null;
    private int connectionTimeout = 15 * 1000; // (ms)

    public AmazonClientManager(Context context) {
        this.context = context;
    }

    public AmazonEC2Client ec2() {
        validateCredentials();
        return ec2Client;
    }

    public AmazonS3Client s3() {
        validateCredentials();
        return s3Client;
    }

    /**
     * ???
     *
     * @return
     */
    public boolean hasCredentials() {
        // ???
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.context);
        if (prefs.getString("prefs_account_access_key", "") == ""
                && prefs.getString("prefs_account_secret_key", "") == "") {
            return false;
        }
        return true;
    }

    /**
     * ?
     */
    public void validateCredentials() {
        if (s3Client == null || ec2Client == null) {
            Log.i(LOG_TAG, "Creating New Clients.");

            // ???
            SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.context);
            String access_key = prefs.getString("prefs_account_access_key", "");
            String secret_key = prefs.getString("prefs_account_secret_key", "");

            // ?
            ClientConfiguration clientconfiguration = new ClientConfiguration();
            clientconfiguration.setConnectionTimeout(this.connectionTimeout); // (ms)

            AWSCredentials credentials = new BasicAWSCredentials(access_key, secret_key);
            s3Client = new AmazonS3Client(credentials, clientconfiguration);
            ec2Client = new AmazonEC2Client(credentials, clientconfiguration);

            // 
            this.changeRegion();
        }
    }

    /**
     * ?
     */
    public void clearClients() {
        s3Client = null;
        ec2Client = null;
    }

    /**
     * 
     */
    public void changeRegion() {
        validateCredentials();
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this.context);
        String region = prefs.getString("region", EC2Region.DEFAULT_REGION);
        ec2Client.setEndpoint("ec2." + region + ".amazonaws.com"); // 
    }
}